Air Conditioning System (For Automatic Air Conditioning System) Problem Symptoms Table

Air Conditioning System (For Automatic Air Conditioning System) -- Problem Symptoms Table


HINT:
  1. Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Front Air Conditioning
Symptom
Suspected Area
See page
All functions of the air conditioning system do not operate
Proceed to "IG Power Source Circuit"
Toyota Fortuner RM000002LLU02YX.html
Integration panel sub-assembly
Toyota Fortuner RM000001K3A018X.html
No. 1 cooler wire
Toyota Fortuner RM000001K3A018X.html
Air conditioning amplifier assembly
Toyota Fortuner RM000001K3A018X.html
Air Flow Control: No blower operation
Indicator check
Toyota Fortuner RM000002LIT02IX.html
Integration panel sub-assembly
Toyota Fortuner RM000001K3A018X.html
No. 1 cooler wire
Toyota Fortuner RM000001K3A018X.html
Proceed to "Heater Relay Circuit"
Toyota Fortuner RM000001DTG013X.html
Proceed to "Blower Motor Circuit"
Toyota Fortuner RM000001DTI01IX.html
Air conditioning amplifier assembly
Toyota Fortuner RM000001K3A018X.html
Air Flow Control: No blower control
Indicator check
Toyota Fortuner RM000002LIT02IX.html
Integration panel sub-assembly
Toyota Fortuner RM000001K3A018X.html
No. 1 cooler wire
Toyota Fortuner RM000001K3A018X.html
Proceed to "Blower Motor Circuit"
Toyota Fortuner RM000001DTI01IX.html
Air conditioning amplifier assembly
Toyota Fortuner RM000001K3A018X.html
Air Flow Control: Insufficient air flow
Proceed to "Blower Motor Circuit"
Toyota Fortuner RM000001DTI01IX.html
Temperature Control: No cool air comes out
Indicator check
Toyota Fortuner RM000002LIT02IX.html
Integration panel sub-assembly
Toyota Fortuner RM000001K3A018X.html
No. 1 cooler wire
Toyota Fortuner RM000001K3A018X.html
Check volume of refrigerant
Toyota Fortuner RM000000VTF00GX.html
Check for refrigerant gas leak
Toyota Fortuner RM000000VTE00GX.html
Cooler expansion valve
Toyota Fortuner RM0000012JQ01LX.html
Proceed to "Pressure Switch Circuit"
Toyota Fortuner RM000001DTB013X.html
Proceed to "Air Conditioning Compressor Magnetic Clutch Circuit"
Toyota Fortuner RM000001DTH017X.html
Proceed to "Air Mix Damper Control Servo Motor Circuit (Passenger Side)"
Toyota Fortuner RM000001LZM00KX.html
Proceed to "Ambient Temperature Sensor Circuit"
Toyota Fortuner RM000001DT9015X.html
Proceed to "Evaporator Temperature Sensor Circuit"
Toyota Fortuner RM000001DTA015X.html
Proceed to "Room Temperature Sensor Circuit"
Toyota Fortuner RM000001DT8014X.html
Proceed to "Solar Sensor Circuit"
Toyota Fortuner RM000001DTK016X.html
Proceed to "Vehicle Speed Signal Circuit"
Toyota Fortuner RM000001DTJ013X.html
Air conditioning amplifier assembly
Toyota Fortuner RM000001K3A018X.html
Temperature Control: No warm air comes out
Indicator check
Toyota Fortuner RM000002LIT02IX.html
Integration panel sub-assembly
Toyota Fortuner RM000001K3A018X.html
No. 1 cooler wire
Toyota Fortuner RM000001K3A018X.html
Proceed to "Air Mix Damper Control Servo Motor Circuit (Passenger Side)"
Toyota Fortuner RM000001LZM00KX.html
Proceed to "Ambient Temperature Sensor Circuit"
Toyota Fortuner RM000001DT9015X.html
Proceed to "Evaporator Temperature Sensor Circuit"
Toyota Fortuner RM000001DTA015X.html
Proceed to "Room Temperature Sensor Circuit"
Toyota Fortuner RM000001DT8014X.html
Proceed to "Solar Sensor Circuit"
Toyota Fortuner RM000001DTK016X.html
Proceed to "Engine Coolant Temperature Communication Circuit"
Toyota Fortuner RM000001LZL00LX.html
Proceed to "Vehicle Speed Signal Circuit"
Toyota Fortuner RM000001DTJ013X.html
Air conditioning amplifier assembly
Toyota Fortuner RM000001K3A018X.html
Temperature Control: Output air is warmer or cooler than set temperature or response is slow
Indicator check
Toyota Fortuner RM000002LIT02IX.html
Integration panel sub-assembly
Toyota Fortuner RM000001K3A018X.html
No. 1 cooler wire
Toyota Fortuner RM000001K3A018X.html
Check volume of refrigerant
Toyota Fortuner RM000000VTF00GX.html
Check for refrigerant gas leak
Toyota Fortuner RM000000VTE00GX.html
Proceed to "Air Mix Damper Control Servo Motor Circuit (Passenger Side)"
Toyota Fortuner RM000001LZM00KX.html
Proceed to "Ambient Temperature Sensor Circuit"
Toyota Fortuner RM000001DT9015X.html
Proceed to "Evaporator Temperature Sensor Circuit"
Toyota Fortuner RM000001DTA015X.html
Proceed to "Room Temperature Sensor Circuit"
Toyota Fortuner RM000001DT8014X.html
Proceed to "Solar Sensor Circuit"
Toyota Fortuner RM000001DTK016X.html
Proceed to "Engine Coolant Temperature Communication Circuit"
Toyota Fortuner RM000001LZL00LX.html
Proceed to "Vehicle Speed Signal Circuit"
Toyota Fortuner RM000001DTJ013X.html
Air conditioning amplifier assembly
Toyota Fortuner RM000001K3A018X.html
Temperature Control: No temperature control (only MAX COOL or MAX WARM)
Indicator check
Toyota Fortuner RM000002LIT02IX.html
Integration panel sub-assembly
Toyota Fortuner RM000001K3A018X.html
No. 1 cooler wire
Toyota Fortuner RM000001K3A018X.html
Proceed to "Air Mix Damper Control Servo Motor Circuit (Passenger Side)"
Toyota Fortuner RM000001LZM00KX.html
Proceed to "Ambient Temperature Sensor Circuit"
Toyota Fortuner RM000001DT9015X.html
Proceed to "Evaporator Temperature Sensor Circuit"
Toyota Fortuner RM000001DTA015X.html
Proceed to "Room Temperature Sensor Circuit"
Toyota Fortuner RM000001DT8014X.html
Proceed to "Solar Sensor Circuit"
Toyota Fortuner RM000001DTK016X.html
Proceed to "Vehicle Speed Signal Circuit"
Toyota Fortuner RM000001DTJ013X.html
Air conditioning amplifier assembly
Toyota Fortuner RM000001K3A018X.html
No air inlet control
Proceed to "Air Inlet Damper Control Servo Motor Circuit"
Toyota Fortuner RM000001DTC013X.html
Air conditioning amplifier assembly
Toyota Fortuner RM000001K3A018X.html
No air flow mode control
Proceed to "Air Outlet Damper Control Servo Motor Circuit"
Toyota Fortuner RM000001DTD013X.html
Air conditioning amplifier assembly
Toyota Fortuner RM000001K3A018X.html
Engine idle up does not occur or is continuous
Proceed to "Air Conditioning Compressor Magnetic Clutch Circuit"
Toyota Fortuner RM000001DTH017X.html
Air conditioning amplifier assembly
Toyota Fortuner RM000001K3A018X.html
Proceed to "ECD System (for 1KD-FTV)"
Toyota Fortuner RM0000012WB03QX.html
Proceed to "SFI System (for 1GR-FE)"
Toyota Fortuner RM000000PD90QCX.html
Diagnostic trouble codes are not stored, and set mode is cleared when ignition switch is off
Proceed to "Back-up Power Source Circuit"
Toyota Fortuner RM000002LLV030X.html
Air conditioning amplifier assembly
Toyota Fortuner RM000001K3A018X.html

Rear Cooler
Symptom
Suspected Area
See page
All functions of rear cooler do not operate
Rear cooler switch
Toyota Fortuner RM00000249K007X.html
Cooler control switch assembly
Toyota Fortuner RM00000249K007X.html
Rear blower register
Toyota Fortuner RM000001JR300QX.html
Rear blower with fan motor sub-assembly
Toyota Fortuner RM000001G9X00DX.html
Harness or connector
-
Air Flow Control: No blower operation
Rear cooler switch
Toyota Fortuner RM00000249K007X.html
Cooler control switch assembly
Toyota Fortuner RM00000249K007X.html
Rear blower register
Toyota Fortuner RM000001JR300QX.html
Rear blower with fan motor sub-assembly
Toyota Fortuner RM000001G9X00DX.html
Harness or connector
-
Air Flow Control: No blower control
Cooler control switch assembly
Toyota Fortuner RM00000249K007X.html
Rear blower register
Toyota Fortuner RM000001JR300QX.html
Rear blower with fan motor sub-assembly
Toyota Fortuner RM000001G9X00DX.html
Harness or connector
-
Temperature Control: No cool air comes out
Rear cooler switch
Toyota Fortuner RM00000249K007X.html
Cooler control switch assembly
Toyota Fortuner RM00000249K007X.html
Harness or connector
-
Rear evaporator sub-assembly
Toyota Fortuner RM000001JR300QX.html